<template>
  <div class="xtx-carousel" >
    <ul class="carousel-body">
      <li
        class="carousel-item"
        v-for="(item, key) in img"
        :key="item.id"
        :class="{ fade: key == imglist }"
      >
        <RouterLink to="/">
          <img :src="item.imgUrl" alt="" />
        </RouterLink>
      </li>
    </ul>
    <a href="javascript:;" class="carousel-btn prev" @click="prev()"
      ><i class="iconfont icon-angle-left"></i
    ></a>
    <a href="javascript:;" class="carousel-btn next" @click="next()"
      ><i class="iconfont icon-angle-right"></i
    ></a>
    <div class="carousel-indicator">
      <span
        v-for="(item, key) in img.length"
        :key="key"
        @click="witch(key)"
        :class="{ liang: key == imglist }"
      ></span>
    </div>
  </div>
</template>

<script>
import { swiper } from "@/utils/Api/NavText";

export default {
  data() {
    return {
      img: [],
      imglist: 0,
      times: null,
    };
  },
  methods: {
    async swiper() {
      let res = await swiper();
      this.img = res.result;
    },
    prev() {
      if (this.imglist <= 0) {
        this.imglist = this.img.length;
      }
      this.imglist--;
      clearInterval(this.times);
      this.show();
    },
    next() {
      if (this.imglist >= this.img.length - 1) {
        this.imglist = -1;
      }
      this.imglist++;
      clearInterval(this.times);
      this.show();
    },
    witch(index) {
      this.imglist = index;
      clearInterval(this.times);
      this.show();
    },

    show() {
      this.swiper(
        (this.times = setInterval(() => {
          this.imglist++;
          // console.log(222);
          if (this.imglist >= this.img.length) {
            this.imglist = 0;
          }
        }, 5000))
      );
    },
    
  },
  mounted() {
    this.show();
  },
  beforeDestroy() {
    if (this.times) {
      clearInterval(this.times);
    }
  },
};
</script>

<style lang="scss" scoped>
.xtx-carousel {
  width: 100%;
  height: 100%;
  min-width: 1240px;
  min-height: 500px;
  position: relative;
  .carousel {
    &-body {
      width: 100%;
      height: 100%;
    }
    &-item {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      opacity: 0;
      transition: opacity 0.5s linear;
      &.fade {
        opacity: 1;
        z-index: 1;
      }
      img {
        width: 100%;
        height: 100%;
      }
    }
    &-indicator {
      position: absolute;
      left: 0;
      bottom: 20px;
      z-index: 2;
      width: 100%;
      text-align: center;
      span {
        display: inline-block;
        width: 12px;
        height: 12px;
        background: rgba(0, 0, 0, 0.2);
        border-radius: 50%;
        cursor: pointer;
        ~ span {
          margin-left: 12px;
        }
        &.active {
          background: #fff;
        }
      }
    }
    &-btn {
      width: 44px;
      height: 44px;
      background: rgba(0, 0, 0, 0.2);
      color: #fff;
      border-radius: 50%;
      position: absolute;
      top: 228px;
      z-index: 2;
      text-align: center;
      line-height: 44px;
      opacity: 0;
      transition: all 0.5s;
      &.prev {
        left: 20px;
        // background: red;
        // margin-left: 240px;
      }
      &.next {
        right: 20px;
      }
    }
  }
  &:hover {
    .carousel-btn {
      opacity: 1;
    }
  }
}
.liang {
  background-color: #fff !important;
}
</style>
